Method to manufacture pole pieces for dynamo electric machine, a

Details Method to manufacture pole pieces for dynamo electric machine, a Method to manufacture pole pieces for dynamo electric machine, a

1982-08-16

1984-05-15

Gilden, Leon

Metal deforming

By use of closed-die and coacting work-forcer

Forcing work into or within closed die; e.g., forging

72334, B21D 2200

Patent

active

044480555

ABSTRACT:
A blank 1 is removed from a strip of material 2 and placed in a die against which a lower punch and an upper punch are operable. In one step, by moving of the lower punch upwardly, shaped to form the pole core or pole piece, and the upper punch against the blank in the die, the pole piece, pole shoes, and outer pole radii at the end portions are formed. If desired, the pole can be perforated and the perforation formed with a thread, and accurately sized in the subsequent cutting and sizing step.

REFERENCES:
patent: 2104222 (1938-01-01), Decker
patent: 2755543 (1956-07-01), Dunn et al.
patent: 3124876 (1964-03-01), Puetti

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